Method of coating and alloying metals



, core. i

pressed rolled,

Patented Apr. 21 i 1925.

PATENT Q Fries."

JAMES J. DUGAN, 0E WILMINGTON, DELAWARE. I

METHD 0F COATING AND ALLOYING METALS.

V 1 i Application tiled October 2, 1920. Serial No. 414,197.

To all .whom-t may concern: Beit known that I, JAMES J; DUGAN, a citizen of the, United States, residing at Wilmington, in thecounty of Newcastle and State of Delaware, have invented new and useful `Improvements in Methods of Coating and Alloying Metals, of which the following is a specification.

This invention relates to the artxof. welding, alloying and uniting steel and nonferreous metals, such as copper and the like.

An object of the present invention is the provision of an improved method of welding, alloying and uniting steeland nonferreous metals, which isexceedinglyvsimple and in -which the depth of the weld or alloy may be regulated as desired.

Another object is the provision of al` method of as above stated, which results in a product that may be forged, stamped, expanded or votherwise worked in any manner without injury to the Weld, maintaining the' same sectional ratio of weld or alloy and the product may be thereafter cold drawn, cold rolled, stamped, pressed or expanded without injury to the Weld, the result being a product which is especially useful in lthe manufacture of electricv conductors of high conductivity, rods, strips, sheets, plates and tubes of various shapes and sections.

In the drawings, in which the product' is illustrated j Figure 1 is a cross sectional view through a steel billet havinga copper coatin secured thereto by the use ofthe method w lich constitutes the present invention.

.Fi ure 2 is, a' similar view showing a ycy*-d lindrical billet having a steel core with a' copper coating or casing surrounding the In practice, the sheet copper. (at ordinary temperature, i. e., unheated) isl referably placed within the walls of a mou d so as to pvrovide a lining for the mould. This mould may belof any desiredshape depending upon the shape of the finished product desired.

7 For example, it may be rectangular or cir- "cular in. cross section The sheet copper 10 or 11 will be placed vagainst the inner face of the walls of the mould.' While copper has been specified, any non-ferreous metal may be substituted.

n layer, and

Steel heated to a ,degree in excess of 2800o F. is then poured Within the copper lining so as to entirely fill the latter, as shown at 12 in the the adjacent or inner face of the lining 10 or 11 to melt so that the copper and steel is commingled and an exceedingly effective weld joins the two metals. This produces at the zone of union of an alloy layer or weld, as shown at 13 and 14 in the drawings.

- The` particular thickness required in this 'weld layer, may be secured by subjecting the product to an appropriate 'cooling action,

determining the thickness of the weld layer.

,p It will be obvious .that this can be accomplished by the usel of a predetermined amount of positive cooling in combination with natural cooling. It will be understood that slow cooling produces a thick Weld Weld layer. For example, in Figure 1 the drawings. This causesA the core and jacket, j

quick cooling produces a thin depth or thicknessof the Weld is indicated f at 13 and in. Figure '2 at 14. The Weldin the last mentioned figure isof relatively -less dept-h or thiclmess, because of the fact that the cooling' action to which the product in Figure 2y has been subjected was quicker than that used in connection fwith producing tlie vdevice shown in Figure 1.

By the use of the above described method,-

a pr uct ofl veryhigh quality results, the method further beingof such an exceedingly' simple character as to be readily understood by persons not skilled in the art to which it appertains.

Minor changes may bemade without departing from the spirit or sacrificing anyof the advantages of the invention, as fall within the scope of the appended claim.

Having described the invention what is claimed 1s The method of forming a`mctal ingotv filling said casing with moltensteel heated to a temperature of not substantially below 2800 F., by pouring the steel into said casing in the mold, to completely fuse a desired depth of the inner surface of the nonferrous metal, and thereby causing the two 5 metals to interpenetrate and Weld together,

and nally cooling product While regulating the speed of Such cooling, to produce a Weld portion of the desired thickness, While preventing iron from alloying with the eX.- ternal portions of the non-ferrous metal. 10

In testimony whereof I afHX my signeture. l

JAMES J. DUGAN. i 

